Unfortunately you can't use a USB keyboard with the Wii right now. There are rumors circulating that one is being made, but other than that you're out of luck.

Now u can. But does anybody know if a wireless will work.

Yes, wireless works. I have a Logitech EX110 wireless keyboard that works great with the Wii. For a list of keyboards, see http://www.answers.com/topic/wii-usb-keyboard-compatibility-list?cat=technology

Be sure that you have Wii firmware 3.1 or later installed.

Note: I price matched the Logitech at OfficeDepot. They sell it for $40, but they honored my price match of $24.99 from TigerDirect.com.
My local OfficeDepot sales rep told me that they price match from ANYWHERE, but your millage may vary.
TigerDirect.com is covered under their office terms.

See:

http://www.officedepot.com/renderStaticPage.do?file=/customerservice/lowPrice.jsp&template=customerService

Also see:

http://www.tigerdirect.com/applications/searchtools/item-Details.asp?EdpNo=1543169&sku=L23-7050

http://www.officedepot.com/a/products/221224/Cordless-EX110-Gray/

What about the new wireless mac keyboard? You know, the crazy thin ones?
I am like apple obsessed an all my electronics have to do with macintosh and sometimes people rule out apple products when they're talking about comp products...

If mt biolagy teacher even heard the that you like apple computers. He would go and tell you to through it off aledge he hates them so much

Dude, no offense, but read through what you are going to post before you post it at least once.
And what does this guy have against Macs any way?
(sorry i'm kind of changing the subject here)

Hi Greenbamboo, I've not tried the latest Apple Wireless Keyboard, but I know Best Buy carries them, if you do not have an Apple Store near by. To find the closest Apple Store go to http://www.apple.com/retail/

Oh, thanks for reminding me. I have already gotten one, but completely forgot to try it out on the wii. I will try to do that soon, and will let you guys Know what the results are.

Greenbamboo, you might want to post your results to the answers.com site I referenced above, so they can have it in their database.